U. Artie Eoff authored Jun 16, 2021 and Haihao Xiang committed Jun 17, 2021

Track kernel and VA driver dependencies so gstreamer
will re-inspect the plugin if any of them change.

Also, do not blacklist the plugin if !msdk_is_available
since it could be a transient issue caused by one or
more external dependency issues (e.g. wrong/missing
driver specified, but corrected by user later on).

Part-of: <!2335>